A grandfather died at a go-kart track where he was celebrating his brother's 60th birthday after his daughter-in-law crashed into the back of his kart and he was flung 12 metres from his vehicle, an inquest heard.

A grandfather drowned his nine-year-old grandson in the bath and then calmly sat rolling a cigarette until his family returned home, a jury in England has been told.

British foreign secretary Philip Hammond has insisted he does not expect a British grandfather to be lashed nor a protester to be executed in Saudi Arabia.

More than 75,000 people have signed a petition urging the release of a British grandfather who reportedly faces 350 lashes after breaking the law in Saudi Arabia when he was caught with home-made wine.